CN114233408A - Emergency trip hydraulic device with sequence valve - Google Patents
Emergency trip hydraulic device with sequence valve Download PDFInfo
- Publication number
- CN114233408A CN114233408A CN202111623578.9A CN202111623578A CN114233408A CN 114233408 A CN114233408 A CN 114233408A CN 202111623578 A CN202111623578 A CN 202111623578A CN 114233408 A CN114233408 A CN 114233408A
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- Prior art keywords
- slide
- plate
- gear
- sequence valve
- control box
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Classifications
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F01—MACHINES OR ENGINES IN GENERAL; ENGINE PLANTS IN GENERAL; STEAM ENGINES
- F01D—NON-POSITIVE DISPLACEMENT MACHINES OR ENGINES, e.g. STEAM TURBINES
- F01D21/00—Shutting-down of machines or engines, e.g. in emergency; Regulating, controlling, or safety means not otherwise provided for
Abstract
The invention relates to the technical field of emergency interruption protection, in particular to an emergency interruption hydraulic device with a sequence valve, which comprises a main body, wherein a control box is arranged between an upper oil duct and a lower oil duct inside the main body, a rotating disc is arranged at the center of the control box, interruption valve plates are respectively connected to the upper side and the lower side of the rotating disc in a sliding manner, the interruption valve plates extend into the corresponding oil ducts and are used for blocking the oil ducts, and a gear assembly used for controlling the interruption valve plates to slide outwards is also arranged on one side of the interruption valve plates. The risk of accidents can be reduced, and the reliability of system operation is effectively improved.
Description
Technical Field
The invention relates to the technical field of emergency trip protection, in particular to an emergency trip hydraulic device with a sequence valve.
Background
In order to prevent the steam turbine from generating serious damage accidents possibly caused by the abnormal operation of part of equipment during the operation of the steam turbine, the unit is provided with a critical interruption system. The emergency breaking system receives the operation parameters from the safety monitoring instrument system of the steam turbine generator unit, the boiler furnace safety monitoring system and other systems, and when the parameters exceed set values, an alarm prompt is given out to avoid the damage of the unit equipment or prevent the further amplification of accidents. The hydraulic control system in the critical interruption system is an important component of the critical interruption system, in the prior art, although unstable equipment can be detected out through a detection instrument and people are prompted to take specific measures, the problem of the hydraulic control system is solved without an effective treatment mode, and the reason is that the hydraulic control system is generally arranged in the equipment, the equipment is in fault during operation, even if alarm prompting is carried out, manual debugging and coping are difficult, a large amount of time is needed, the hydraulic control process is not timely, and accidents cannot be avoided.
Disclosure of Invention
The invention aims to solve the defects in the prior art and provides a hydraulic device with a sequence valve for emergency interruption.
In order to achieve the purpose, the invention adopts the following technical scheme:
a critical interruption hydraulic device with a sequence valve comprises a main body, wherein two oil ducts are arranged in the main body, the oil ducts are distributed up and down to form a staggered shape, a control box is arranged in the main body between the upper oil duct and the lower oil duct, a circular groove is formed in the center of the control box, a rotating disc is rotatably arranged in the circular groove, two sides of the rotating disc are respectively hinged with connecting rods through led-out lugs, slide ways are respectively arranged above and below the circular groove, slide blocks are respectively connected in the slide ways in a sliding manner, the upper slide way and the lower slide way are respectively communicated with the circular groove in the center of the control box, the upper slide way and the lower slide way are respectively communicated with the corresponding oil ducts up and down, the outer ends of the connecting rods at two sides of the rotating disc are respectively connected with the corresponding slide blocks up and down, interruption valve plates are respectively arranged at the side surfaces of the upper slide block and the lower slide block, which are extended into the corresponding oil ducts and are used for blocking the oil ducts, the inside of control box still is provided with the straight hole in one side of circular slot, the downthehole bottom of straight hole is provided with the cylinder body, downthehole top sliding connection has the sliding plate, the bottom entry of cylinder body docks with the oil duct of below, and the bottom entry inboard of cylinder body is provided with the valve body, be provided with the piston in the cylinder body, the top of piston is provided with the piston rod, the top of piston rod docks in the bottom surface of sliding plate upwards, the inside of control box still is provided with the gear, the gear is located between the slider of top and the sliding plate, the slider that is located the top is provided with the second rack with gear looks adaptation towards the side of gear, the sliding plate is provided with the first rack with gear looks adaptation towards the side of gear.
Preferably, the cross-sectional shape of the shutoff valve plate is matched with the inner wall profile of the slideway, and a gap is reserved between the plate surface of the shutoff valve plate and the slideway.
Preferably, the plate surface of the shutoff valve plate is sleeved with a plurality of rings of sequentially adjacent sealing rings.
Preferably, the convex blocks on both sides of the rotating disk are symmetrically arranged about the center line of the rotating disk.
Preferably, the inner walls of the two sides of the slide way are respectively provided with a guide groove, and two side walls of the slide block are respectively provided with a ball sliding along the channel of the guide groove.
Preferably, the valve body is a sequence valve.
Preferably, the length of the sliding plate is less than half of the length of the straight hole.
Preferably, the outer contour of the sliding plate is matched with the aperture cross-sectional shape of the straight hole.
The invention has the beneficial effects that:
1. the rotating disc rotates, and can drive the upper and lower sliders to move in the same direction or in the same direction and in the opposite direction under the transmission of the connecting rod; when one of the sliding blocks slides up and down, the rotating disc can be driven to rotate by the transmission of the connecting rod, and the other sliding block is further controlled to slide up and down, so that the working purpose that the upper sliding block and the lower sliding block move towards each other or back to back at the same direction can be realized, and the process of reversing can be finally used for controlling the upper and lower two shutoff valve plates to synchronously work and simultaneously sealing the upper and lower oil passages.
2. The gear is rotated by the up-and-down lifting of the sliding plate, the up-and-down lifting of the sliding plate leads the sliding block on the other side to do lifting movement different from that of the sliding plate, at the moment, when the sliding plate is lifted upwards, the sliding block on the other side is retracted into the slideway, and when the sliding plate is lowered downwards, the sliding block on the other side slides outwards out of the slideway and is blocked in the oil duct.
3. The face of the interceptor valve plate is sleeved with a plurality of rings of sealing rings which are adjacent in sequence, the interceptor valve plate can cover the corresponding interface of the slide and the oil duct under normal conditions, the sealing rings outside the interceptor valve plate can play a sealing role, the oil duct is prevented from leaking oil into the control box in the normal operation process, the interceptor valve plate slides out of the slide, the interceptor valve plate and the sealing rings on the interceptor valve plate can play a role in blocking oil, and the oil is prevented from flowing through the oil duct.
In conclusion, through the hydraulic device provided by the scheme, the problem that the set is damaged or an accident can be caused because the information feedback of an emergency interruption hydraulic control system cannot be timely processed in the operation of a steam turbine is solved.
Drawings
Fig. 1 is a schematic front view of a hydraulic emergency circuit breaker with a sequence valve according to the present invention;
FIG. 2 is an enlarged view of a portion A of FIG. 1 of a critical shutoff hydraulic apparatus having a sequence valve in accordance with the present invention;
fig. 3 is a schematic view of an assembly structure of a rotating disk, a sliding block and a shutoff valve plate in a control box of the hydraulic emergency shutoff device with the sequence valve.
In the figure: 1. a main body; 2. an oil passage; 3. a control box; 4. a circular groove; 5. a slideway; 6. rotating the disc; 7. a bump; 8. a slider; 9. a shutoff valve plate; 10. a connecting rod; 11. a straight hole; 12. a cylinder body; 13. a piston; 14. a valve body; 15. a piston rod; 16. a sliding plate; 17. a gear; 18. a first rack; 19. a second rack.
Detailed Description
The technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only a part of the embodiments of the present invention, and not all of the embodiments.
In the embodiment, referring to fig. 1 to 3, a hydraulic device for emergency interruption with a sequence valve includes a main body 1, two oil ducts 2 are arranged in the main body 1, the oil ducts 2 are distributed up and down to form a staggered shape, a control box 3 is arranged in the main body 1 between the upper and lower oil ducts 2, a circular groove 4 is formed in the center of the control box 3, a rotating disk 6 is rotatably mounted in the circular groove 4, two sides of the rotating disk 6 are respectively hinged with a connecting rod 10 through a lead-out bump 7, and the bumps 7 on two sides of the rotating disk 6 are symmetrically arranged about the center line of the rotating disk 6. The upper side and the lower side of the circular groove 4 are respectively provided with a slide rail 5, the slide rail 5 is internally and slidably connected with a slide block 8, the inner walls of two sides of the slide rail 5 are respectively provided with a guide groove, and two side walls of the slide block 8 are respectively provided with a ball sliding along the channel of the guide groove. This transmission process is reversible: the rotating disc 6 rotates, and can drive the upper and lower sliders 8 to move in the same direction or in the opposite direction under the transmission of the connecting rod 10; when one of the sliders 8 slides up and down, the rotating disk 6 can be driven to rotate by the transmission of the connecting rod 10, and the other slider 8 is controlled to slide up and down, so that the working purpose that the two sliders 8 move towards each other or move back to back at the same time can be achieved.
The upper and lower slide 5 respectively with control box 3 central circular slot 4 intercommunication, upper and lower slide 5 keeps the intercommunication with corresponding oil duct 2 from top to bottom respectively simultaneously, the connecting rod 10 outer end of rotary disk 6 both sides is connected with corresponding slider 8 from top to bottom respectively, upper and lower slider 8 is provided with shutoff valve plate 9 respectively at its side of keeping away from rotary disk 6, shutoff valve plate 9 extends to in the corresponding oil duct 2 and is used for shutoff oil duct 2, the cross-sectional shape of shutoff valve plate 9 and the inner wall profile looks adaptation of slide 5 to reserve the clearance between the face of shutoff valve plate 9 and slide 5, it has a plurality of rings of adjacent sealing washer in proper order to cup joint on the face of shutoff valve plate 9. The shutoff valve plate 9 will block up at the corresponding kneck of slide 5 and oil duct 2 under normal condition, utilize the sealing washer in the shutoff valve plate 9 outside to play sealed effect, prevent that oil duct 2 from having the oil body seepage to control box 3 in the normal operating process, when shutoff valve plate 9 roll-off from this slide 5, shutoff valve plate 9 and the sealing washer on the shutoff valve plate 9 can play the effect of shutoff fluid again, prevent that fluid from flowing through in the oil duct 2.
A straight hole 11 is further formed in one side of the circular groove 4 in the control box 3, a cylinder body 12 is arranged at the bottom of the straight hole 11, a sliding plate 16 is connected to the top of the straight hole in a sliding mode, the length of the sliding plate 16 is smaller than half of the length of the straight hole 11, and the sliding plate 16 is beneficial to sliding up and down in the straight hole 11 in length design. The external profile of the sliding plate 16 is matched with the aperture section shape of the straight hole 11, the bottom inlet of the cylinder body 12 is in butt joint with the oil passage 2 below, the valve body 14 is arranged on the inner side of the bottom inlet of the cylinder body 12, and the valve body 14 is a sequence valve which can achieve the purpose of stopping oil from entering. A piston 13 is arranged in the cylinder 12, a piston rod 15 is arranged at the top of the piston 13, the top end of the piston rod 15 is butted against the bottom surface of a sliding plate 16, a gear 17 is further arranged in the control box 3, the gear 17 is positioned between the upper sliding block 8 and the sliding plate 16, a second rack 19 matched with the gear 17 is arranged on the side surface of the upper sliding block 8 facing the gear 17, a first rack 18 matched with the gear 17 is arranged on the side surface of the sliding plate 16 facing the gear 17, the rotation of the gear 17 is realized by the up-and-down lifting of the sliding plate 16, the up-and-down movement of the sliding plate 16 causes the sliding block 8 at the other side to perform a different up-and-down movement with respect to the sliding plate 16, at this time, when the sliding plate 16 is lifted up, the sliding block 8 at the other side is retracted into the slideway 5, when the sliding plate 16 descends, the sliding block 8 on the other side slides outwards out of the slideway 5 and is blocked in the oil duct 2.
The specific working principle is as follows: firstly, controlling the valve body 14 to open, sending a certain amount of oil body into the cylinder body 12, pushing the sliding plate 16 to be lifted upwards to a proper height (the proper height is that the interceptor valve plate 9 on the other side is just positioned in the slideway 5) by using the piston 13, and then closing the valve body 14, wherein the oil duct 2 is used for conveying the oil body, and the state is the normal state of daily operation of the equipment; when the flow speed of the oil body in the oil passage 2 is increased instantaneously, the pressure below the valve body 14 will be reduced, so that the valve body 14 is opened again, the oil body originally stored in the cylinder 12 is discharged outwards, at this time, the piston 13 descends, under the transmission action of the gear 17, the obstruction valve plate 9 positioned above the other side will slide out from the slideway 5 and be blocked in the oil passage 2, and because the upper and lower obstruction valve plates 9 are operated synchronously, the lower obstruction valve plate 9 will be blocked in the oil passage 2 below at the same time, and finally, both the upper and lower oil passages 2 are blocked by the obstruction valve plate 9, thereby effectively avoiding the oil body from being conveyed. Therefore, the oil body leakage can be avoided, and the accident risk can be reduced.
The above description is only for the preferred embodiment of the present invention, but the scope of the present invention is not limited thereto, and any person skilled in the art should be considered to be within the technical scope of the present invention, and the technical solutions and the inventive concepts thereof according to the present invention should be equivalent or changed within the scope of the present invention.
Claims (8)
1. The emergency breaking hydraulic device with the sequence valve comprises a main body (1), wherein two oil ducts (2) are arranged in the main body (1), the oil ducts (2) are distributed from top to bottom to form a staggered shape, the emergency breaking hydraulic device is characterized in that a control box (3) is arranged in the main body (1) between the upper oil duct and the lower oil duct (2), a circular groove (4) is formed in the center of the control box (3), a rotating disc (6) is rotatably mounted in the circular groove (4), connecting rods (10) are hinged to two sides of the rotating disc (6) through led-out bumps (7), slide ways (5) are respectively formed above and below the circular groove (4), slide blocks (8) are slidably connected in the slide ways (5), the upper slide way and the lower slide ways (5) are respectively communicated with the circular groove (4) in the center of the control box (3), and the upper slide way and the lower slide ways (5) are respectively communicated with the oil ducts (2) corresponding to the upper portion and the lower portion, the outer ends of connecting rods (10) at two sides of the rotating disc (6) are respectively connected with corresponding upper and lower sliding blocks (8), the upper and lower sliding blocks (8) are respectively provided with a blocking valve plate (9) at the side surface far away from the rotating disc (6), the blocking valve plate (9) extends into the corresponding oil duct (2) and is used for blocking the oil duct (2), a straight hole (11) is further formed in one side of the circular groove (4) in the control box (3), a cylinder body (12) is arranged at the bottom in the hole of the straight hole (11), a sliding plate (16) is connected to the top in the hole in a sliding manner, a bottom inlet of the cylinder body (12) is in butt joint with the lower oil duct (2), a valve body (14) is arranged on the inner side of the bottom inlet of the cylinder body (12), a piston (13) is arranged in the cylinder body (12), a piston rod (15) is arranged at the top of the piston (13), and the top end of the piston rod (15) is in butt joint with the bottom surface of the sliding plate (16) upwards, the inside of the control box (3) is also provided with a gear (17), the gear (17) is positioned between the sliding block (8) and the sliding plate (16), the side surface, facing the gear (17), of the sliding block (8) positioned above is provided with a second rack (19) matched with the gear (17), and the side surface, facing the gear (17), of the sliding plate (16) is provided with a first rack (18) matched with the gear (17).
2. The hydraulic emergency shut-off device with sequence valve according to claim 1, characterized in that the cross-sectional shape of the shut-off valve plate (9) is adapted to the inner wall profile of the slide (5), and a gap is provided between the plate surface of the shut-off valve plate (9) and the slide (5).
3. The hydraulic emergency circuit breaker device with a sequence valve according to claim 2, wherein the plate surface of the circuit breaker valve plate (9) is sleeved with a plurality of rings of sequentially adjacent sealing rings.
4. Hydraulic critical interruption device with sequence valve according to claim 1, characterized in that the cams (7) on both sides of the rotating disc (6) are arranged symmetrically with respect to the centre line of the rotating disc (6).
5. The hydraulic emergency trip device according to claim 1, wherein the slide (5) has guide grooves on its inner walls, and the slide (8) has balls on its two side walls, which slide along the guide grooves.
6. A critical interruption hydraulic device with sequence valve according to claim 1, characterized in that the valve body (14) is a sequence valve.
7. A critical interruption hydraulic device with sequence valve according to claim 1, characterized in that the length of the sliding plate (16) is less than half the length of the straight hole (11).
8. A critical interruption hydraulic device with sequence valve according to claim 1, characterized in that the outer profile of the sliding plate (16) matches the cross-sectional shape of the bore diameter of the straight bore (11).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202111623578.9A CN114233408B (en) | 2021-12-28 | 2021-12-28 | Emergency trip hydraulic device with sequence valve |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202111623578.9A CN114233408B (en) | 2021-12-28 | 2021-12-28 | Emergency trip hydraulic device with sequence valve |
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| Publication Number | Publication Date |
|---|---|
| CN114233408A true CN114233408A (en) | 2022-03-25 |
| CN114233408B CN114233408B (en) | 2022-10-25 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202111623578.9A Active CN114233408B (en) | 2021-12-28 | 2021-12-28 | Emergency trip hydraulic device with sequence valve |
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| CN (1) | CN114233408B (en) |
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| CN212376997U (en) * | 2019-12-26 | 2021-01-19 | 靖江市新世纪液压件制造有限公司 | Direct-acting overflow valve |
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| CN113503381A (en) * | 2021-08-10 | 2021-10-15 | 宁波诚天液压有限公司 | Pneumatic control pressure regulating reversing element |
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2021
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| CN114233408B (en) | 2022-10-25 |
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